KEYES ROSTOK Manual And Manual page 47

Now, press CTRL+ALT+1 again, if the nozzle near X axis point is so low that the paper is
pressed down, it means that this value
is too small and we need to increase it and update it to main control board. We don't have to adjust this
value
Repeat this step until A4 paper can be pulled with a certain amount of resistance force being felt. Now
the whole manual leveling process is finished.
Conclusion: The ideal circumstance is that the distance between the nozzle and glass is always the same
when script 1-4 commands are sent. That's to say, when pulling the paper, you should feel a certain
amount of resistance force. The distance should be equal to the thickness of a piece of A4 paper.
Lowest point of center area
or the screw above the sliding block any more.
45
in firmware